Preserve HTML Formatting in Network Intent Send Email Action

The Network Intent send email action currently inserts a line break tag for every line of the message body, even when the message is already formatted using HTML tags. This behavior alters the intended layout and causes unwanted spacing or broken formatting when HTML content is submitted. This enhancement proposes detecting HTML-formatted message content and suppressing the automatic insertion of line break tags in that case, allowing the HTML markup to render as authored. Customers who build HTML-formatted notifications through Network Intent would gain accurate, predictable email formatting without manual workarounds.